Class: LoadLibraryHandler

Inherits:
AbstractCommandHandler show all
Defined in:
lib/javonet-ruby-sdk/core/handler/load_library_handler.rb

Constant Summary collapse

@@loaded_libraries = 
[]

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from AbstractCommandHandler

#handle_command, #iterate

Constructor Details

#initialize ⇒ LoadLibraryHandler

Returns a new instance of LoadLibraryHandler.



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# File 'lib/javonet-ruby-sdk/core/handler/load_library_handler.rb', line 8

def initialize
  @required_parameters_count = 1
end

Class Method Details

.get_loaded_libraries ⇒ Object 



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# File 'lib/javonet-ruby-sdk/core/handler/load_library_handler.rb', line 39

def self.get_loaded_libraries
  @@loaded_libraries
end

Instance Method Details

#process(command) ⇒ Object

Raises:

  • (LoadError) 


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# File 'lib/javonet-ruby-sdk/core/handler/load_library_handler.rb', line 12

def process(command)
  raise ArgumentError.new 'Load library parameters mismatch' if command.payload.length < @required_parameters_count

  assembly_name =
    if command.payload.length > @required_parameters_count
      command.payload[1]
    else
      command.payload[0]
    end

  # Normalize to absolute path
  expanded_path = File.expand_path(assembly_name)

  # Load only once per absolute path
  return 0 if @@loaded_libraries.include?(expanded_path)

  # Check if the library exists:
  raise LoadError.new("Library not found: #{assembly_name}") unless File.exist?(expanded_path)

  # Require by path; Ruby will also avoid re-loading the same feature,
  # but we additionally track it ourselves.
  require expanded_path

  @@loaded_libraries << expanded_path
  0
end